(CNN) A Covid-19 outbreak at a Georgia sleep away camp this June could have implications for school reopening, the US Centers for Disease Control and Prevention said.The camp had followed some but not all of the CDC mitigation steps against the spread of the new coronavirus — but was not enough to keep campers and staff free of illness.
“Settings, like multi-day, overnight summer camps, pose a unique challenge when it comes to preventing the spread of infectious diseases considering the amount of time campers and staff members spend in close proximity,” the CDC wrote in a statement.
“Our best estimate right now is that for every case that’s reported, there actually are 10 other infections,” CDC Director Dr. Robert Redfield said on a call with reporters Thursday.
The assessment comes from looking at blood samples across the country for the presence of antibodies to the virus. For every confirmed case of COVID-19, 10 more people had antibodies, Redfield said, referring to proteins in the blood that indicate whether a person’s immune system has previously fought off the coronavirus.
Those samples aren’t just from people who have had antibody testing. They also come from testing performed on donated blood at blood banks or from other laboratory testing of blood.
Currently, there are 2.3 million COVID-19 cases reported in the U.S. The CDC’s new estimate pushes the actual number of coronavirus cases up to at least 23 million.